diff --git a/manager.js b/manager.js
index 570b3c1..1dc38be 100644
--- a/manager.js
+++ b/manager.js
@@ -315,6 +315,7 @@ doctor.sites = function(config) {
 		sites = {};
 	}
 	if (Array.isArray(config.sites)) {
+		sites = {};
 		config.sites.forEach(function(site) {
 			sites[site.subject] = site;
 		});